Facile fabrication of PF-540-Eu@TOCNF films with hydrophobic and photoluminescent properties

Based on the biodegradable natural polymer compound TEMPO-oxidized cellulose nanofibrils, and using EuCl3 & sdot;6H2O, 3-aminopropyltrimethoxysilane and 1H,1H,2H,2H-perfluorooctyltrimethoxysilane as functional reagents, a novel type of cellulose nanofibril composite films with hydrophobic and photoluminescent properties was fabricated by a simple solvothermal method. The effects of reaction time, reaction temperature, Vol.% C2H5OH, solvents dosage, and n (Eu3+: COOH) on the photoluminescence and hydrophobicity of the films were investigated, while the films were characterized by using UV meter, fluorescence spectrometer, contact angle meter, FT-IR, XPS, SEM, EDS, TEM, XRD and TG. The results demonstrate that the surface of the film is uniformly loaded with Eu3+ and emits bright red light under UV irradiation, which has excellent photoluminescence, hydrophobicity (water contact angle 137.6 degrees) and higher thermal stability. And high-value applications of nanocellulose in the fields of bioimaging, anti-counterfeiting and sensing detection in the low-temperature and high-humidity environment will be expanded.